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a problem with AD5734AREZ output range

Question asked by boulder on Jan 25, 2012
Latest reply on Feb 7, 2012 by boulder

We are using AD5734AREZ in our design and it seems that there are some problem with the output range. In the firmware, I configure it as +10.8 V output, however some times the output will be 5V once I power on the board. It does not happen very often, maybe 5~10% of chance, but it has to be resolved.


We have tried quite a few things, but none worked. I can even read back the output range selection register and it says 2 which should be 10.8V, but the actual output is 5V.


I am attaching the schematic here and can someone give me some suggestion?